Students are given three, six, or nine hours of sleep. They are given 20 minutes
ID: 55854 • Letter: S
Question
Students are given three, six, or nine hours of sleep. They are given 20 minutes to take a test the test scores are compare between the three groups.
In the experiment above what is" test scores are compared".
A. Negative control
B. independent variable
C. control variable
D. dependent variable
Three BT 456 corn plans are subject to low, medium, or high infestation by ECB. kernel-yields are collected and Weighed.
What is a control variable for this experiment
A. Amount of kernel yield
B. Level of ECB infestation
C. Amount of soil for each plant
D. None of the above is a control variable
Explanation / Answer
The correct option is (D) dependent variable. A dependent variable is what you measure in the experiment and what is affected during the experiment.
Controlled variables are quantities that remain constant.
Here, the controlled variable is (C) Amount of soil for each plant.